which she say she's using her dad account with his consent and the reason why she use her dad account is a restriction on speech. Well I wouldn't judge her excuses since she's still not really understand about this forum rules.
Coincidentally this reasoning might sound convincing enough, assuming a child is using his father's account.
but the question is where did he know about this forum?
so that he easily uses the account, even though his father is dead and agrees what does he mean?
the reason is the account already changed hands and it's used to warn other users which know who's BccKing wouldn't get tricked as now the ownership already changed.
Usually people will know the account has changed hands by looking at the previous post and comparing it with the latest post, or going to the profile and pressing trust, there will see the account has been changed email, password and wake up from a long sleep, this is a simple way to detect that the account has changed hands.
So where is your fault?
If leaving negative feedback is wrong, then how about many DT members already leave negative feedback then? does they should changed his feedback to n
But for the negative feedback that is given, has a different view, must have a basic reference, as long as it can be proven correctly and doesn't blame the rules, then I think it's a fair thing for you to do.
Because if switching accounts is justified, more and more accounts that were dead will come back to life.